Fringe

John Noble is one of the only cast members who appeared in all 100 episodes.

Every time the title sequence is red, the episode takes place in the parallel universe, because red is opposite to green on the color wheel, which is the color the sequence usually is.

For the first season, each episode of 'Fringe' ran from about 49 to 51 minutes in length. This is in contrast to the typical 42-43 minute length of a one hour drama. This was an experiment by Fox to see if viewers are more likely to tune in if there are fewer commercials.